How China Managed to Muffle the Voice of America

Last month I was scheduled to interview the Chinese real estate and investment tycoon Guo Wengui about his claims of extensive corruption in the Chinese Communist Party. Mr. Guo—who sometimes calls himself Miles Kwok—worked closely for years with Chinese intelligence services and says he even financed their operations. He has lived abroad since 2015 and granted me a live interview in his New York apartment.

In preparation for the April 19 segment, I did a 10-hour preinterview with Mr. Guo. My questions focused on his...